In Act I, scene 3 of "Macbeth", Banquo tells his son what happened on the heath. What happened on the heath?
In Act I, scene 3 of "Macbeth," the three witches discuss the havoc that they have wrought upon humans as Macbeth and Banquo approach, but are unaware of the witches. In a line of great foreshadowing Macbeth alludes unknowingly to the initial prophecy of these witches: "So fair and foul a day I have not seen (I,iii, ). The witches greet him each with a title:
All hai, Macbeth! Hail to thee, Thane of Glamis!....Thane of Cawdor!...King...(I,iii,49-51)
Of course, Macbeth is nonplused by these titles since those holding them are yet alive. Then, Banquo inquires about his future. He is told, paradoxically, that he will be lesser and greater; he will not become king, but his sons will. As the witches disappear, Banquo is left to wonder if what he has seen and heard is but an illusion:
Were such things here as we do speak about?/Or have we eaten on the insane root/That takes the reason prisoner? (I,iii,83-85)
In the next scene, however, Banquo thinks better of what the spirits have told him, for he cautions Macbeth,
The instruments of darkness tell us truths,/Win us with honest trifles, to betray's/In deepest consequence. (I,iii,124-126)